Abstract:

In the actual wireless communication systems, the transmission delay is one of dominant factors which determine the system performances. A new incremental redundancy hybrid automatic repeat request (HARQ) scheme based on the characters of rate compatible punctured turbo codes is proposed. With the method, the initial state of incremental redundancy system and the initial sending parity bits according to the channel condition will be set. As to the new scheme, simulation results are provided that transmission delay for the data frame received correctly is distinctly reduced and it is applied easily.

Key words: hybrid automatic repeat request, turbo code, incremental redundancy (IR), transmission delay, adaptive